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Old 12-11-2011, 03:11 PM
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Need to find out what this is called.

Above the passenger side valve cover in the coolant line going to heater core is a valve or something. Its black and it puking coolant on me. What is this actually called and what does it do?
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Old 12-11-2011, 03:30 PM
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Its the valve that allows coolant to flow to your heater core when you turn the heater on. It is controlled by the vacuum. It probably doesn't cost much. Can't remember the exact name of it though.
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Old 12-11-2011, 03:31 PM
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Sounds like heater control valve...but not sure without pics. Does it have a grey vacuum hose attached?
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Old 12-11-2011, 03:31 PM
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I don't know the technical name for it, but it's a vacuum operated valve. When you turn your AC on max setting, vacuum is used to close the valve and prevent coolant from entering the heater core so you will have cooler AC.

You can either replace it or get a piece of pipe in its place. If you decide to go with the cheap pipe fix, you need to cap off the gray vacuum line so you don't have a vacuum leak. Lucky for us, for supplied a nipple for those who didn't have the heater valve.

The nipple is on the HVAC box. In this picture, below my finger you will see the gray vacuum line connected to the nipple. I don't use AC too much so I removed my valve in place for the coolant filter connection.
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